Senior Systems Administrator
(Linux, VMware, Ansible) – Remote with Data Centre Visits
I am searching for a
Senior Systems Administrator
for my client, a
fast-growing global software company
supporting some of the world's most critical financial systems. They specialise in
secure digital transaction technology
, partnering with banks and enterprises across the globe to prevent fraud and keep digital commerce safe.
You'll be joining a
tight-knit, highly skilled Production Support & Infrastructure team
that plays a vital role in keeping their platform running smoothly, securely, and at scale. This is a
high-impact role
where your work will directly contribute to protecting millions of users worldwide.
If you're looking for
autonomy, trust, and variety in your day-to-day work
, alongside people who genuinely take pride in what they do, this is a brilliant opportunity.
What You'll Be Doing
* Managing and supporting
production infrastructure
across on-premise and cloud environments
* Maintaining and automating Red Hat Linux systems, including
Satellite patching, CVE remediation, and bare metal deployments (Kickstart)
.
* Writing and maintaining Ansible playbooks for automation and infrastructure consistency, with ability to
troubleshoot failures
.
* Exposure to
Ansible Tower / AWX (UI)
desirable.
* Ensuring robust change control processes are followed - no rogue changes, strict process adherence
* Participating in a 1-in-3
on-call rota
(15-minute response time)
* Supporting
scheduled maintenance windows
(e.g. Sunday mornings, 1–2x/month)
* Performing occasional hands-on
data centre tasks
(rack-and-stack, cabling, physical installs)
* Collaborating with DevOps and App Support teams on infrastructure improvement and reliability
Key Skills & Experience
* Expert-level VMware
(provisioning, tuning, upgrades,
vMotion/live migration
, troubleshooting, performance monitoring).
* Strong Red Hat Linux & Satellite
— patching, CVE remediation, and
bare metal installs (Kickstart)
.
* Proven Ansible capability
— writing and maintaining playbooks, troubleshooting failures (script vs Ansible execution), with
Ansible Tower/AWX exposure
preferred.
* Familiarity with
SAN storage
in VMware environments.
* Experience operating in production environments with
formal change control
and ITIL-aligned processes.
* Scripting skills in
Bash, Python, or PowerShell
.
* Comfortable with physical data centre work (rack, cabling, mounting).
* Ability to work independently and flexibly in a lean global team (approx. 300 employees worldwide).
* Previous experience in financial services, defence, or other regulated industries is a plus.
Working Setup
* Remote-first
role with occasional
on-site work at a Slough-based data centre
(1x per week or fortnight)
* Occasional travel to a European site (Amsterdam – approx. 3–4 times per year)
* Global scope with systems based in
UK, Europe, US, and Israel
Cultural Fit
* Process-driven, pragmatic, and calm under pressure.
* Able to explain technical concepts clearly to peers and stakeholders.
* Follows structured, secure workflows (especially in production).
* Flexible — willing to troubleshoot and adapt to business needs.
* Not seeking a rigid 9-to-5, but values work-life balance.